Excelsior Fruit Fly Medium for Cultures

Excelsior is the natural wood fiber substrate that gives your fruit flies a place to pupate and thrive. This 2oz pack is enough for 5 cultures — just add a handful to one of our 32oz Culture Cups alongside Repashy Superfly, seed with flies, and you're done.

• 2oz pack — enough excelsior for 5 fruit fly cultures
• Natural wood fiber — gives flies the perfect surface to pupate
• Works with Repashy Superfly and our 32oz Culture Cups
• ⚠️ Cannot be shipped with live feeders due to size